Typewriting-machine



A. G. F. KUROWSKI.

TYPEWRITING MACHINE.

APPLICATION FILED SEPT. 3. 1919.

1,370,323. Patented Mar. 1, 1921.

hvenfor:

UNITED STATES PATENT OFFICE.

q.r xumwsxr, on; NEW'YORK, ASSIGNOR 'ro Ummnwoon I YBEWBITRB. 0.81! 39 311 I-LAQQQEBQBAIIQK OI DELAW R .HQMRINQJEACEINE sn c ass ie of stt rflatean.

. Patent ar..1,. 921.

Application fled fleptelnber 3, 1919. Serial No. 321,307.

T 0 all whom it may concern:

Be it known that-I, G. F. Kunow SKI, a subject of the Emperon of Ger.- many or a citizen of Germany, but having taken out preliminary-United States naturalization papers, residing. in Brooklyn borough, in the county of Kings, city: and Stateof New York, have invented; certain new and useful; Improvementsin. Typewriting-Machines, of which the. following is a specification.

This invention relates to key-tops, and more especially to key tops oftypewriter keys. Such key-tops include a paper on whichis printed thedesignation of'the-type or types controlled by-theparticular-key and a glass cover serving to protect-the aper. In some instances, itmay bedesira le to change the type papers so: as to substitute others bearing diflerent characters, or to substitute blanks. This: invention, there. fore, has for-anobjeot such improvement-inthe construction ofa key-top that the-key paper thereof may be changed by an operative who-isunskilled in mechanics by anextremely simple; manipulation.

A feature of the invent-ion resides in the provisionofga key-cuphaving a, slot therein of sufiicient extent to permit the ready, in-

sertion and withdrawal of. the -keyrpaper,

and preferably in the particular embodiment of the invention shown, this slot is normally closed by a flexible and resilient member carried by the key-ring. Prefer ably, also, the ke -ring is made of springmetal, so that w en the resilient member thereof is moved to position to prevent withdrawal of the key-paper, said member will immediately return to normal position when released. The key-rin has a cut-away portion or slot which coincides with the slot in the key-cup, the resilient member closing both slots when in normal position.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a perspective view of a key having my invention applied thereto.

Fig. 2 is a composite view with the parts in perspective, said-view showing the keycup, the key-paper and glass, and the keyring as it would appear before it is completely formed.

Fig. 3 is a sectional view, showing the parts in the position they would occupy when a. keys-paper is in the process ofi'being andrbeing-provi ed with a slot 3 extending a distanceofgabout half of the circumference of the flangerof theeup. Through this slot the key-papers: and key+glass 5* may be inserted an'dawithdrawn. The key-cup issurmounted b .a key-ring Ghavinga hent over topflangegan'dia lug 8 dependingfrom the side flange, said lug 8"adapted to be bent under the bottom oft-he cup, as shownin Figs. 3 and 4. The ring also has a cutaway portion 9 adjacent the slot, 3 of the cup tov enable the insertion and" withdrawal ofsthekey-paperand'keyglass. r

In. order-toretain the key-paper and glass in position.withinthe key cup, and alsoto assistin theretentionoff the key-rin on the key-cup, the key-ri'ng is provided with a member 10, which, when bent-up from. the position shown in: Fig. 2 tothe position shown in Fig. 5, will'lieunderneath thecup and engage-'thebottom thereoff Said member'lo'hasja 1ip-11,1which, when bent up to the sitionishown in Figsrl, 3 and 4, serves to; e ose-the-slots'in the ring and cup, and

thereby retain the key-paper and glass in tirel within the key-cup, as shown in Fig.

4, t e resilient member l0 automatically moves to position so that the lip 11 closes the slots in the cup and the ring, and also by reason of the engagement with the bottom of the key-cup serves to hold the keyring in place.

Variations may be resorted to within the scope of the invention, and portions of the im rovements may be used without others.

aving thus described my invention, I

claim: 1. A key-top comprising a key-cup for retainin'g' a key-paper, said cup having a slot for the insertion and withdrawal of the key;

carried by said key-ring for closing said slot. p

3. A typewriter key-top comprising a keycup and a key-ring, said key-cup having a slot therein, said key-ring being formed of spring-metal, and having a'resilient member formed as a part thereof for closing said slot.

4. In a typewriter key-top comprising; in combination, a key-cup for retaining agkeypaper, a key-ring surmounting said key-cup; and'resilient means acting to retain said key-ring in position on the key-cup and to retain the key-paper within the key cnp;

'5. A key-top comprising a key cup .ior retaining a key-paper, said cup having a slot for the insertion and withdrawal of the keypaper, and a key-ring snrmo'unting said cup and carrying resilient means to close said sl'ot, said means being movable to release said ring. V r r a 6. A key-top comprising a key-cup for re taining a key-paper, said 0111) having a slot for the insertion and withdrawal of the keypaper, and a key-ringsurmountinglsaid cup and having atslot coincident with't-he slot in the cup, said ring carrying resilient'means for' closing said slots, said resilient means being movable to release said ring;

7 .1 In a typewritervjkey,"the combination with a key-stem, rof'a key-cup having a socket for mounting the cup on said stem, a key-paper and glass in said cup, said cup having a slot in its vertical circular wall to permit insertion and withdrawal of thekeyand glass, and a keyring provided with-a slot coincident with the slot in the key-ciip,f and having depending prong and a resilient member adapted to engage thebase of said cup, said resilient member carrying an upwardly-extending prong to close the slots.

'8. In a typewriter key, the "combination with a key-stem,i of a key-cup having a resilient member carrying an upwardly-extending prong to closethe slots, theresilient member being movable to releaSeJs'aidring. i: 9. In a typewriter key, the combination with a key-stem, of, a key cup having a socket for mounting the cupon said stem, akey paperand glass'in said cup, said cup having aslot in its vertical circular wall to permit insertion and withdrawal of said key-paper and glass, anda flanged key-ring providedwith-a slot coincident with the slot in the key-cup, and having a'depending prong and a resilient,member adapted to engage the base ofsaid cup, said resilient member carrying an. upwardly -extending prongtoclose the slots, the resilient memher being movable to release said ring, said flanged ringbeing adaptedto clamp the key-paper and glass ingsaid cup.

. Wi nesses: V'EDITHLIBBEY,

. N E THORNE., 

